Agata Katsuhira was an unusual youth, marked by an absence of physical sensation. His existence shifted irrevocably upon meeting Sonozaki Noriko, a young woman shrouded in mystery. Their encounter became a catalyst, altering not only Agata'…

The children were compelled to offer self-introductions. But it quickly became apparent that Sonozaki desired something far beyond a simple name and class designation. They soon discovered a penalty for every incorrect response, and painful…

The children discovered that a single other Kiznaiver existed, and with a shared sense of curiosity, they set out to find this enigmatic person.

As the children grew acquainted with Hisomu, Sonozaki extended an offer: a summer training camp in exchange for a glimpse into a secret concerning the Kiznaivers.

Arriving at the training camp, the Kiznaivers confront the quintessential summer challenge: a trial of courage. Separately, Chidori ventures off, prompting a realization among the group – a sense that their bonds might extend beyond the sha…

A shadow from Honoka’s history resurfaces, casting a pall over her present. Meanwhile, Nico persists in his efforts to forge a connection with her, seeking friendship once more.

As the bonds between them deepened, the Kiznaivers learned the hidden history of Maki Katsuragi, and resolved to offer her solace and support in navigating it.

A typhoon traps the Kiznaivers within the confines of a building, and the enforced proximity stirs long-buried emotions into the open.

The ability to hear one another's thoughts deepens the already intricate relationships of the Kiznaivers, adding further layers of complexity. Simultaneously, a concealed truth concerning Sonozaki and Katsuhira comes to light.

The bonds forged within the Kiznaiver group begin to unravel, each member pursuing a path distinct from the others. Simultaneously, Katsuhira uncovers the hidden history of the Kizna Experiment, along with the veiled past of Sonozaki.

Katsuhira learns the fate of the friends he knew in youth, while Sonozaki remains resolute in her pursuit of the Kizna Experiment's completion, undeterred by any obstacles.

As Noriko prepared to leap from the bridge, the black Gomorin broadcast her anguish throughout the city, a desperate plea intended to forge unity among its people.